github.com/ebakus/go-ebakus@v1.0.5-0.20200520105415-dbccef9ec421/crypto/blake2b/blake2bAVX2_amd64.go (about)

     1  // Copyright 2019 The ebakus/go-ebakus Authors
     2  // This file is part of the ebakus/go-ebakus library.
     3  //
     4  // The ebakus/go-ebakus library is free software: you can redistribute it and/or modify
     5  // it under the terms of the GNU Lesser General Public License as published by
     6  // the Free Software Foundation, either version 3 of the License, or
     7  // (at your option) any later version.
     8  //
     9  // The ebakus/go-ebakus library is distributed in the hope that it will be useful,
    10  // but WITHOUT ANY WARRANTY; without even the implied warranty of
    11  // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
    12  // GNU Lesser General Public License for more details.
    13  //
    14  // You should have received a copy of the GNU Lesser General Public License
    15  // along with the ebakus/go-ebakus library. If not, see <http://www.gnu.org/licenses/>.
    16  
    17  // +build go1.7,amd64,!gccgo,!appengine
    18  
    19  package blake2b
    20  
    21  import "golang.org/x/sys/cpu"
    22  
    23  func init() {
    24  	useAVX2 = cpu.X86.HasAVX2
    25  	useAVX = cpu.X86.HasAVX
    26  	useSSE4 = cpu.X86.HasSSE41
    27  }
    28  
    29  //go:noescape
    30  func fAVX2(h *[8]uint64, m *[16]uint64, c0, c1 uint64, flag uint64, rounds uint64)
    31  
    32  //go:noescape
    33  func fAVX(h *[8]uint64, m *[16]uint64, c0, c1 uint64, flag uint64, rounds uint64)
    34  
    35  //go:noescape
    36  func fSSE4(h *[8]uint64, m *[16]uint64, c0, c1 uint64, flag uint64, rounds uint64)
    37  
    38  func f(h *[8]uint64, m *[16]uint64, c0, c1 uint64, flag uint64, rounds uint64) {
    39  	switch {
    40  	case useAVX2:
    41  		fAVX2(h, m, c0, c1, flag, rounds)
    42  	case useAVX:
    43  		fAVX(h, m, c0, c1, flag, rounds)
    44  	case useSSE4:
    45  		fSSE4(h, m, c0, c1, flag, rounds)
    46  	default:
    47  		fGeneric(h, m, c0, c1, flag, rounds)
    48  	}
    49  }